HD 168443
HD 168443 is a yellow dwarf star of (spectral type G5) about the mass of the Sun. It is in the constellation of Serpens Cauda, 129 light years from the Solar System. It is known to be orbited by one large planet, discovered in 1999, and a brown dwarf, discovered in 2001. The brown dwarf takes 30 times longer to orbit the star than the gas giant planet.[2][3][4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >7.696 ± 0.015[5] MJ | 0.29 | 58.116 ± 0.001 | 0.529 ± 0.02 | — | — |
| c | >17.378 ± 0.044[5] MJ | 2.87 | 1739.5 ± 3.8 | 0.228 ± 0.005 | — | — |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 18h 20m 03.9332s[1] |
| Declination | −09° 35′ 44.6093″[1] |
| Apparent magnitude (V) | 6.92 |
| Characteristics | |
| Spectral type | G5IV |
| Astrometry | |
| Proper motion (μ) | RA: −91.685±0.089[1] mas/yr Dec.: −224.285±0.077[1] mas/yr |
| Parallax (π) | 25.2084 ± 0.0772[1] mas |
| Distance | 129.4 ± 0.4 ly (39.7 ± 0.1 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
See also
- HD 38529
- List of extrasolar planets
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Marcy, Geoffrey W.; et al. (1999). "Two New Planets in Eccentric Orbits". The Astrophysical Journal. 520 (1): 239–247. arXiv:astro-ph/9904275. Bibcode:1999ApJ...520..239M. doi:10.1086/307451.
- Marcy, Geoffrey W.; et al. (2001). "Two Substellar Companions Orbiting HD 168443". The Astrophysical Journal. 555 (1): 418–425. Bibcode:2001ApJ...555..418M. doi:10.1086/321445.
- Reffert, S.; Quirrenbach, A. (2006). "Hipparcos astrometric orbits for two brown dwarf companions: HD 38529 and HD 168443". Astronomy and Astrophysics. 449 (2): 699–702. Bibcode:2006A&A...449..699R. doi:10.1051/0004-6361:20054611.
- Wang, Sharon Xuesong; et al. (2012). "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b". The Astrophysical Journal. 761 (1). 46. arXiv:1210.6985. Bibcode:2012ApJ...761...46W. doi:10.1088/0004-637X/761/1/46.
External links
- "Two new planetary systems discovered" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. January 9, 2001. Retrieved August 13, 2019.
- "Notes for star HD 168443". The Extrasolar Planets Encyclopaedia. Retrieved 2008-09-08.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.